Heat-coil.



W. L. GOURSEN. HEAT 00m APPLICATION FILED JAN. 20, 1908.

944,540 Patented Dec. 28, 1909 6QME65566. l'maeraz orr UNITED STATESPATENT orrios.

NE'W JERSEY, ASSIGNOR '10 \VESTEB'N ELECTRIC COMPANY, OF CHIGAGC,ILLINOIS, A CORPJRATION GTE ILLINGIS.

WALTER Lustre ooonsnn, or EAST our in:

944,540, Specification of Letters Patent. Earfientegl D93, 28, 1909,

Application filed .l'zin'iary .26, Serial. No. $1,605.

To all whom it may co nea/11,: tit Q1 in which the heat cartridge isheld. on lie it known that I, VA-LTER Lnscir. Cooal the protector stripis ndicated at the right sun, a citizen of the United States. residinFig. 1, such cartridge being shown'in ing at East Orange, in the countyof connection with a well-known type of,pro and State of New Jersey,have invented a 1 teeter-strip. The cartridge is held between certainnew and useful Improvement in l the irings 9 and 10, the tension of theHeat-Coils, of which the following is a full, i spring tending to slidethe tube 7 farther clear, and exact description. i into the shell ll henthe solder 8 is melt- My invention relates to heat-coil preteen i eclbyabnormal currents in the heat coil,

devices for electrical circuits, and its Such movement of the tube iseilected and objectis to provide an improved heat cari the pin 5 whichbears against the spring 11 tridge which is capable of use with the isfree to press said spring against the l ordinary protector-strip. groundstrip id to which plate 12 is con- My invention contemplates a heatcarec fl 8. ci ed at the left of Fig- 1.

tridg'e in which the member or element thus grounding the circuit in awell-known erated by the action of abnormal currents manner. After thecartridge has thus operin the coil is adapted after such. operation iated, it can be reset by merely reversing the to be reversed withrelation to the heat coil. pin nd he tube 7 carried thereby. the TheSeveral features of my invention may i Icn aining parts of the heatcartridge being be more readily understood by reference to fl etheaccompanying drawings, wherein In the slightly modified form of my in- Fgure 1 18 a plan view of a protecto vention shown in Fig. 3 the pin 5 isnot strip showing a pair of heat cartridges held reversible. e re r btube 7 S S cu ed 7 therein, one of said cartridges being shown y SOltlBlin othe Sui ab e manner,

' the spool 1 and the other end to the metallic as operated to groundthe circuit; Fi 9 within a collar 13 which is reversibly mountis aon'gitudinal section of a heat cartridg ed in the open end of the spool1, said colerribodymg my invention; and Fig. .3 is a tar beingpreferably threaded in said spool. similar view of a modified form. Toreset the cartridge after it has operated Like parts 211T? designated bysimilar charit is necessary merely to reverse the collar. acters ofreference throughout the several 13 in the 810001 views. I. have thusprovided a protective device The hollow metallic spool 1 h s c il f ifor electrical circuits in which the heat coil heat-producing wire 2wound thereon, one itselit and the shell within which it. 18

end of said wire being attached as usual to mounted are non'reveifsible,the resetting of the heat coil afer each operation involvingshell 3. Inthe bottom of the shell is a dish i instead the reversing ofthe'operated memst of insulating material inwhich the spool ber of theheat cartridge. 3. is threaded or otherwise secured, said What I claimis: spool being thus insulatedly mounted within 1. In a pro -ec ol 01 ee c circuits, the l ell. i combination with a heat coil, of a memerringmore particularly to the einber s'urroiuided by said coil and projectingbodimgnt of my kijlrvention shown in Fig. 2, from (inc end thereof, saidmember being repin is reversi y mounted in the spool l, l versib c withrelation to said coil. said pin being preferably threaded at eaph l Tina prote ctor for electrical circuits, the end, so that either endthereof may be I combination with a non-reversible heat coil, threadedin the head 601. the spool. Sel of a reversibly mounted nieinbe'rprojecting puree]?1 apout the pirli 5 (it meii nber or tube through saidcoil. i w 101 is normal T he in" ix c .itcn ".1 r .Olijhe pin but whiizhis adapted td de i e 1 ch; leased when heated by abnormal current inwound upon said spool, and a member assthe coil 2. Said tube ispreferably held in llli'f throdgh the spool and projecting rom place bylow fusing solder 8. one end i iereol. said member being reversi- Boththe pin 5 and the tube 7 project be i ble with relation to said spool.yond the end of the coil 2, the "pin itself enl. In a protector forelectrical circuits, the no tending beyond the tube. The normalposicombination with a heat coil, of a member surrounded by said coiland projecting from one end thereof, and HUS-1115 -tor renrersiblymounting suid member in said coil, said member being norn'mlly fixedwith relation to sold coil but adopted under the influence of heatdeveloped by said coil to have a slid ing motion relative thereto.

A heat. curtrid 'e comprising a spool, a heat coil wound tnere'on, :1member surrounded by said spool and projecting from one end thereof, andmeans for reversibly mounting said member within said spool, I

said member being normally secured to the mounting means but slidingthereon under the influence of the abnormal heat developed by said coil.

6, A heat cartridge comprising a spool, .11 heat coil wound thereon, amounting piece reversibly secured within said spool, and a membercarried by said mounting piece, said nuunber being normally fixed withrelation to the mounting piece but arranged to be rcleused by the eflect of abnormal heat developed by said coil,

7, A heat cartridge comprising u spool, 51 heat coil wound thereon, apin mounted within said spool and projecting from one end thereof, and atube surrounding said pin and reversibly mounted in said spool with oneend prl'ljecting beyond the end thereof, said tube being normally linedwith reluticn to said spool but arr-un ed to be released by the efi'ectof abnormal lie-st developed by said coil.

3, In a protector for i the combination with shels, a spool mountedWithin said shell and insulated therefrom, coil wound upon said spool,one e1 l of said coil being connected to said shell and the other tosaid spool, a, mountin piece reversibly secured within said'spoo and a,member carried by said mountin piece, said member bein normally fix'with relation to the mounting iece but arranged to be released by the eect of abnor mal heat, developed by said coil.

9. In a, protector for electrical circuits, the combination with ashell, of a spool mounted within said shell and insulated so acetherefrom, a coil wound upon said spool, one end of said coil beingconnected. to said shell and the other to said 5 col, :1 pin mountedwithin said spool an projcctlng from one end thereof, and a tubesurrounding said pin and reversibly mounted in said spool with one endprojecting beyond the end thereof, said tube being normally fixed withrelation to said spool but arranged to be released by the eliect ofabnormal heat developed by said coil.

10. The combination with av hollow spool, of a heat coil wound thereon,a collar rc versibly mounted in one end of said spool, and a membermounted within said collar and normally held in fixed relation thereto,said member being adapted to be released by the action of abnormal heatdeveloped by said coil.

11. The combination with a hollow spool, of a heat coil wound thereon, adollar rever sibly mounted in one endof said spool, a tube mountedWithin said :collar and. normally held in fixed relation thereto,saidtube being adapted to be released by the action of abnormal heatdeveloped by said coil, and

a pin secured to the oppositeend of saidspool and-projecting throu hsaid .tube.

12. In a protector for c ectrical circuits, the combination with ashell, of a. spool mounted within said shell and insulated therefrom, acoil wound upon said spool one end of said coil being connected to saidshell and the other to said spool, a collar reversibly mounted inone'end of said spool, a tube mounted within said collar and non tubebein adapted to be released by the tion of'a coil, and a said spool androjectin through said tu e.

In witness w ereof, hereunto subscribe my name this 14th day of JanuaryA. D. 1908. i

WALTER LESLIE oounsnn Witnesses:

J 01m J. LYNG, CLARENCE G. S'm'rr.

normal heat developed by said pin secured to the opposite endni mollyheld in fixed relation thereto" said v

